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In 1975, an oil refinery in Philadelphia exploded, and the ensuing fire killed 8 firefighters. Which of the following best describes the event in scientific terms?
  • A: The refinery was trying to put the crude oil through a chemical change, but accidentally triggered a physical change.
  • B: The refinery was trying to put the crude oil through one chemical change, but accidentally triggered a different chemical change.
  • C: The refinery was trying to put the oil through a physical change, but accidentally triggered a chemical change.
  • D: The refinery was trying to put the oil through one physical change, but accidentally triggered a different physical change.